Colloids. Emulsion: An emulsion is a mixture of 2 liquids that are unblendable. In an emulsion, one liquid (dispered phase) is mixed into the other liquid. An example of an emulsion is salad dressing as you can still see the vinegar in the olive oil when it is still in a the bottlle. This make salad dressing an emulsion because the two liquids are unable to fully mix together.
A. Two immiscible liquids, not yet emulsified.
B. An emulsion of Phase II dispersed in Phase I.
C. The unstable emulsion progressively separates.
D. The surfactant (purple outline around particles) positions itself on the interfaces between Phase II and Phase I, stabilizing the emulsion.
Can you trust your senses? 1. Where does the most bending of the light occur in the eye?
The most bending of light happens in the lens.
2. Describe how the lens works
The lens moves depending on what your eye is trying to focus on.
3. Why do we squint when exposed to bright light?
We squint when we are exposed to bright light because when it is dark, our pupils get bigger to let in as much light as possible. We squint when we are exposed to bright light because then we don't need as much light to see.
4. Which parts of the eye are involved in focusing?
The lens and the iris are involved in focusing.
5. Discuss the implications of losing one eye.
The implications of losing one eye is that it would make your brain confused because you would only have one optic nerve connecting to only one eye.
Student task Two Discuss: Visual impairment Do you know anyone who wears glasses or contacts? Why? How do glass or contacts help?
I know people who are visually impaired for many different reasons. Such as, the shape of the eye ball, diseases and accidents. Glasses and contacts help by spreading light out or bringing light in. Are there other solutions for people with visual impairments?
Other solutions for visual impairments is laser surgery.
Use the resource from the last section to find out about visual impairments -describe two visual impairments. Describe some possible solutions.
Short sighted - the light stops before it hits your retina. A solution is lenses that spreads light out.
Long sighted - the light extending past the retina. Solutions could be lenses that bring light in.
Animal Senses
Lesser Long-nosed Bat (Leptonycteris curasoae yerbabuenae)
Bats have a special sense called ecolocation. They use ecolocation to navigate their surroundings. They make a high frequency noise, which then echoes off objects. The brain and ears help make an image of what is their surroundings. An undeveloped sense for bats is their sight. This is probably because they live in dark places.
Krissy
Pot
Crossed
Ollie
Feeling
Grossly
Sick
Asian Elephant (Elephas maximus) Classification:
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Elephas
Species: Maximus
Classes of Vertebates
Reptiles
Mammals
Amphibians
Birds
Fish
Characteristics
Reptiles - skin have scales, claws on their toes, ectothermic invertebrates
Mammals - they have sweat glans, endothermic invertebrates
Amphibians - ectothermic invertebrates, three chambered heart
Birds - endothermic invertebrates, feathers, 4 chambered heart
Fish - ectothermic aquatic invertebrates, scales
http://www.ecnca.org/Animals/
Colloids.
Emulsion: An emulsion is a mixture of 2 liquids that are unblendable. In an emulsion, one liquid (dispered phase) is mixed into the other liquid.
An example of an emulsion is salad dressing as you can still see the vinegar in the olive oil when it is still in a the bottlle. This make salad dressing an emulsion because the two liquids are unable to fully mix together.
A. Two immiscible liquids, not yet emulsified.
B. An emulsion of Phase II dispersed in Phase I.
C. The unstable emulsion progressively separates.
D. The surfactant (purple outline around particles) positions itself on the interfaces between Phase II and Phase I, stabilizing the emulsion.
http://en.wikipedia.org/wiki/Emulsion
Can you trust your senses?
1. Where does the most bending of the light occur in the eye?
The most bending of light happens in the lens.
2. Describe how the lens works
The lens moves depending on what your eye is trying to focus on.
3. Why do we squint when exposed to bright light?
We squint when we are exposed to bright light because when it is dark, our pupils get bigger to let in as much light as possible. We squint when we are exposed to bright light because then we don't need as much light to see.
4. Which parts of the eye are involved in focusing?
The lens and the iris are involved in focusing.
5. Discuss the implications of losing one eye.
The implications of losing one eye is that it would make your brain confused because you would only have one optic nerve connecting to only one eye.
Student task Two
Discuss: Visual impairment
Do you know anyone who wears glasses or contacts? Why? How do glass or contacts help?
I know people who are visually impaired for many different reasons. Such as, the shape of the eye ball, diseases and accidents. Glasses and contacts help by spreading light out or bringing light in.
Are there other solutions for people with visual impairments?
Other solutions for visual impairments is laser surgery.
Use the resource from the last section to find out about visual impairments
-describe two visual impairments. Describe some possible solutions.
Short sighted - the light stops before it hits your retina. A solution is lenses that spreads light out.
Long sighted - the light extending past the retina. Solutions could be lenses that bring light in.
Animal Senses
Bats have a special sense called ecolocation. They use ecolocation to navigate their surroundings. They make a high frequency noise, which then echoes off objects. The brain and ears help make an image of what is their surroundings. An undeveloped sense for bats is their sight. This is probably because they live in dark places.